PMID- 19940123 OWN - NLM STAT- MEDLINE DCOM- 20100222 LR - 20211020 IS - 1083-351X (Electronic) IS - 0021-9258 (Print) IS - 0021-9258 (Linking) VI - 285 IP - 4 DP - 2010 Jan 22 TI - Nuclear factor 1 synergizes with progesterone receptor on the mouse mammary tumor virus promoter wrapped around a histone H3/H4 tetramer by facilitating access to the central hormone-responsive elements. PG - 2622-31 LID - 10.1074/jbc.M109.060848 [doi] AB - Steroid hormones induce transcription of their responsive genes by complex mechanisms including synergism between the hormone receptors and other transcription factors. On the mouse mammary tumor virus (MMTV) promoter progesterone induction is mediated by the reciprocal synergism between progesterone receptor (PR) and the ubiquitous transcription factor nuclear factor 1 (NF1). PR binding mediates ATP-dependent displacement of histone H2A and H2B, enabling NF1 access to its target site. In minichromosomes assembled in vitro NF1 binding facilitates access of PR to the hormone-responsive elements (HREs) by precluding reforming of the histone octamer, but the function of NF1 in living cells remains unclear. Here we show that depleting NF1 by small interfering RNAs or mutating the NF1-binding site significantly compromises transcription of the MMTV promoter. The central HREs 2 and 3 are not needed for ATP-dependent H2A/H2B displacement or NF1 binding but are critical for full PR binding and MMTV transactivation. We found that NF1 binding to the MMTV promoter on a H3/H4 histone tetramer particle exposes the central HREs and facilitates their binding by PR, suggesting a possible mechanism for the reciprocal synergism between PR and NF1. FAU - Vicent, Guillermo Pablo AU - Vicent GP AD - Centre de Regulacio Genomica, Universitat Pompeu Fabra, Parc de Recerca Biomedica, Dr Aiguader 88, E-08003 Barcelona, Spain. guillermo.vicent@crg.es FAU - Zaurin, Roser AU - Zaurin R FAU - Nacht, A Silvina AU - Nacht AS FAU - Font-Mateu, Jofre AU - Font-Mateu J FAU - Le Dily, Francois AU - Le Dily F FAU - Beato, Miguel AU - Beato M LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20091124 PL - United States TA - J Biol Chem JT - The Journal of biological chemistry JID - 2985121R RN - 0 (Chromatin) RN - 0 (Histones) RN - 0 (Hormones) RN - 0 (NFI Transcription Factors) RN - 0 (Nucleosomes) RN - 0 (RNA, Small Interfering) RN - 0 (Receptors, Progesterone) RN - EC 1.13.12.- (Luciferases) SB - IM MH - Breast Neoplasms MH - Cell Line, Tumor MH - Chromatin/physiology MH - Female MH - Histones/*metabolism MH - Hormones/metabolism MH - Humans MH - Luciferases/genetics MH - Mammary Tumor Virus, Mouse/*genetics MH - NFI Transcription Factors/*metabolism MH - Nucleosomes/physiology MH - Promoter Regions, Genetic/physiology MH - RNA, Small Interfering MH - Receptors, Progesterone/*metabolism MH - Response Elements/physiology MH - Transcription, Genetic/physiology MH - Transcriptional Activation/physiology PMC - PMC2807319 EDAT- 2009/11/27 06:00 MHDA- 2010/02/23 06:00 PMCR- 2011/01/22 CRDT- 2009/11/27 06:00 PHST- 2009/11/27 06:00 [entrez] PHST- 2009/11/27 06:00 [pubmed] PHST- 2010/02/23 06:00 [medline] PHST- 2011/01/22 00:00 [pmc-release] AID - S0021-9258(19)63756-7 [pii] AID - M109.060848 [pii] AID - 10.1074/jbc.M109.060848 [doi] PST - ppublish SO - J Biol Chem. 2010 Jan 22;285(4):2622-31. doi: 10.1074/jbc.M109.060848. Epub 2009 Nov 24.